Method of and machine for boring fellies



2 SheetsSheet 1.

(No Model.)

7 JR. LOOKE. METHOD OF AND MAOHINE FOR BORING FELLIES.

Patented Sept. 20, 1881.

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(No Model.) 2 Sheets-Sheet 2,

J.R.LOGKE. METHOD OF AND MACHINE FOR BORING FELLIES. o. 247,258. Patented Sept. 20,1881.

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UNITED STATES PATENT OFFICE.

JOSEPH R. LOOKE, OF AMESBURY, MASSACHUSETTS.

METHOD OF AND MACHINE FOR BORING FELLlES.

SPECIFICATION forming part of Letters Patent No. 247,258, dated September 2 0, 1881. I Application filed April 20, 1881. (No model.) I

To all whom it may concern Be it known that I, JosEPH R. LooKE, 0 Amesbury, State of Massachusetts, have invented an Improvement in Wheels, of which the following is a specification.

Thisinvention relates to an improved method of boring the spoke-holes in wheel-fellies and in the machine by which such method is carried into practice; and the invention will, in connection with the annexed drawings, be hereinafter fully described, and specifically defined in the appended claims.

Figure 1 is a side elevation of my said machine as viewed from the left in Fig. 2. Fig. 2 is a front elevation taken as viewed from the right in Fig. 1. Fig.3 is a detached elevation showing the felly under pressure, and as being bored by my method. Fig. 4 is an enlarged detached view showing a section of a felly as bored by myimproved method,and alsoaspoketenon in section, and as inserted in said felly.

In the manufacture of wheels for vehicles, and especially light wheels with bent rims, one of the practical and most serious difficulties to be encountered and obviated, in so far as has hitherto been possible, has been the danger and tendency of the rims to split adjacent to the spoke-holes therein. This tendency or danger arises from the necessity of a very close fit and consequent heavy pressure between the spoke-tenon and the interior of the felly when driven together,such pressure being requisite in order that the spoke shall not work loose in the felly, and to prevent the contractile force of the tire when shrunk upon the wheel from upsetting and bulging the fell y or rim adjacent to the spoke-holes therein; and such requisite uniform pressure between the spoke and felly without danger of splitting the latter is rendered difficult of attainment by reason of the different degrees of density of the timber from which different spokes or parts of the rim are formed, and the varying positions of the grain or lamina thereof, and also the consequent varying action of the tenoning and boring tools thereon, by which a larger hole and smaller tenon are formed in the softer than in the more dense wood when the reverse result should be accomplished.

To obviate the splitting of the felly when not riveted or otherwise metal-fastened, and yet obtain the required degree of pressure of the spoke-tenon in the felly, as also to prevent the upsetting and consequent bulging of the felly by the contractile force of the tire when set upon the wheel, I have invented the method of producing or forming the spoke-holes in the felly with a greater diameter transversely to than longitudinally with the felly, by which means any desired amount of pressure may be exerted by and between the felly and the spoketenons without in the least tending to split the felly, and yet the pressure be such as to prevent any upsetting or bulging of the felly by the contractile force of the tire.

For the purpose of carrying my said method into effect I have invented the machine shown in said Figs. 1 and 2, in which d represents the bed, and cc the legs. The arbor m is journaled in boxes 10, secured to bed cl, as shown, motion being imparted to said arbor by a belt acting upon pulley p. In thet'ront end of said arbor is secured in the usual manner the boring-bit l, which may be of any desired size. Said arbor is arranged to slide lineally in bearings 10 a distance slightly more than the depth of the largest felly, and it is so moved by means of hand-lever 6, which is pivotallyconnected with clutch 7 in the well-known manner. The lower end of said lever is connected with the fulcrum-bar s, which is pivotally attached to the lever and to leg 0, as"

shown in Figs. 1 and 2.

In Figs. 1, 2 are shown iron slides or ways 9, which are rigidly bolted to the front of the machine, as shown, and between these ways is arranged the vertically-sliding bar 5, which is interlocked with and guided by said slides, as shown in said figures. To the top of said slides, as also to the top of bed cl, is secured the curvedfaced pressure block 6, while beneath the overhang or angle of slide 5 is secured the upper curved-faced pressure-block f, between which and block 6 the felly a is compressed while being bored, as is shown in Fig. 2 and the detached view Fig. 3. To effect such desired compression upon the felly when being bored, the curved treadlej, having the foot-pad k, is pivoted in stud 2 at the requisite distance below.

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arm is at its lower end pivoted at 4 to a lug on sliding bar 5, whereby the depression of the lower end of treadlej will, through the devices described, force blockf down upon the felly a when it is seated between said blockscf, when, by means of hand-lever 6, arbor m is moved forward to engage bit lwith the felly which is thus bored when under compression between figuration of the circular cross-section of spoketenon b and the oval holes in felly a are shown in necessarily exaggerated degree; but they show the practical efl'ectot' such method in preventing the checking and splitting of the telly by the internal pressure of the tenon 1) upon the side walls of the hole 0.

I claim as my invention 7 1. The described method of forming the spoke-holes in wheel rims or fellies, the same consistingin subjecting the rim to pressure and then forming a round hole therein when so compressed, whereby the expansion of the wood when relieved from said pressure will enlarge such hole in the direction transverse to the line of the rim, substantially as specified.

2. In a wheel-boring machine, the combination of the rotary reciprocating arbor m, formed to receive and actuate the boring-too], the compression-blocks c f, and mechanism, substantially as described, for actuating said arbor and said blockf, for the purpose specified.

JOSEPH R. LOGKE.

Witnesses:

Gno. H. BRIGGS, J. T. CLARKSON. 

